linked-rolls
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    Interface VerticalSpan

    Describes the vertical extent of a feature on the roll, measured in track numbers. Track numbers correspond to positions on the tracker bar.

    crm:E54 Dimension

    interface VerticalSpan {
        from: Track;
        to?: Track;
        unit: "track";
    }
    Index
    from: Track

    The start track number of the feature.

    reo:from

    to?: Track

    The end track number, if the feature spans multiple tracks. If omitted, the feature occupies a single track.

    reo:to

    unit: "track"

    The unit of measurement for vertical positions.

    crm:P91 has unit